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[libunwind] Be more careful about enabling GCS #101973

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Merged
merged 1 commit into from
Aug 5, 2024
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[libunwind] Be more careful about enabling GCS #101973

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6 changes: 5 additions & 1 deletion libunwind/src/cet_unwind.h
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Original file line number Diff line number Diff line change
Expand Up @@ -39,9 +39,13 @@
// need to guard any use of GCS instructions with __chkfeat though, as GCS may
// not be enabled.
#if defined(_LIBUNWIND_TARGET_AARCH64) && defined(__ARM_FEATURE_GCS_DEFAULT)
#define _LIBUNWIND_USE_GCS 1
#include <arm_acle.h>

// We can only use GCS if arm_acle.h defines the GCS intrinsics.
#ifdef _CHKFEAT_GCS
#define _LIBUNWIND_USE_GCS 1
#endif

#define _LIBUNWIND_POP_CET_SSP(x) \
do { \
if (__chkfeat(_CHKFEAT_GCS)) { \
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